ATMEGA32HVE2-PLPW - 32KB AVR MCU for Lead-Acid BMS | Microchip
Référence : ATMEGA32HVE2-PLPW ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.62 | $5,62 |
| 10 | $5.05 | $50,50 |
| 100 | $4.51 | $451,00 |
| 500 | $4.07 | $2 035,00 |
| 1 000 | $3.65 | $3 650,00 |
ATMEGA32HVE2-PLPW Présentation
A Battery Management IC (BMIC) for lead-acid chemistries is a mixed-signal microcontroller that combines an ADC front-end, charge/discharge control logic, and a communications interface to supervise battery health. The ATMEGA32HVE2-PLPW sits in the sub-family of AVR microcontrollers optimized for 12V/24V lead-acid applications, distinguished from general-purpose ATmega parts by integrated high-voltage I/O and dedicated coulomb-counter peripherals. It belongs to the broader hierarchy: microcontroller -> embedded MCU -> 8-bit AVR family -> semiconductor device.
Key differentiating features include 32KB of self-programmable Flash for application firmware and lookup tables, 4KB SRAM for data buffering of cell measurements, hardware multiplier support via the AVR core, and on-chip debug via debugWIRE. The 48-VQFN package with exposed thermal pad provides a low-profile, surface-mountable footprint suitable for compact battery monitor modules, with the exposed pad offering a thermal path for sustained ADC sampling workloads.
Architecturally, the ATMEGA32HVE2 leverages the standard AVR RISC pipeline with 131 instructions and 32 general-purpose working registers, enabling high code density. The part includes multiple timer/counters, an enhanced ADC with differential inputs ideal for shunt current sensing, and hardware support for PWM-based charge-control loops. The 15MHz clock rate, combined with most instructions executing in a single cycle, yields throughput approaching 15 MIPS.
Typical applications include 12V/24V lead-acid battery monitors, uninterruptible power supply (UPS) battery health modules, e-bike and e-scooter battery packs, solar charge controller telemetry, and automotive 12V auxiliary battery supervision. In each case, the device's wide input voltage range and integrated sensing peripherals reduce external component count.
One critical design consideration is thermal management: when sampling current at high discharge rates, the exposed pad must be soldered to a sufficient copper pour to dissipate self-heating from the linear regulator and ADC analog front-end. Engineers should also ensure the high-voltage pins are not exposed to transients beyond the absolute maximum ratings stated in the datasheet.
This page synthesizes distributor pricing, drop-in replacement alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the ATMEGA32HVE2-PLPW against competing BMS microcontrollers in the same VQFN-48 footprint.
Alternatives de remplacement direct pour ATMEGA32HVE2-PLPW — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA32HVE2-PLPW (même facteur de forme et même empreinte) — différant par Package, Core Architecture, Program Memory (Flash), ADC, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA32HVB-8X3
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.1 / unité
Voir la fiche technique →ATMEGA32C1-15AZ
✅ Remplacement direct✓ En stock
$2.95 / unité
Voir la fiche technique →ATMEGA32A-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.95 / unité
Voir la fiche technique →ATMEGA32HVE2-PLPW Valeurs maximales et caractéristiques électriques
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| EEPROM | 1 KB |
| Fréquence d'horloge maximale | 15 MHz |
| Supply Voltage Range | 4 V to 25 V (9 V to 24 V typical for lead-acid BMS) |
| Boîtier | 48-VQFN (7x7 mm) with exposed pad |
| Type de montage | Surface Mount |
| Instruction Set | 131 instructions, mostly single-cycle |
| ADC | Differential-input ADC for current sensing |
| Timers/Counters | Multiple 8/16-bit timer/counters |
| On-chip Debug | debugWIRE |
| Target Application | Lead-acid battery management (BMS) |
| Nombre de broches | 48 |
| Statut RoHS | Compliant |
Configuration des broches de ATMEGA32HVE2-PLPW
| Broche 1 | VCC — Main supply voltage input (4V-25V) |
| Broche 2 | GND — Ground reference |
| Broche 3 | AVCC — Analog supply voltage for ADC |
| Broche 4 | AGND — Analog ground for ADC |
| Broche 5 | AREF — ADC reference voltage |
| Broche 6 | PA0 — Port A bit 0 (analog input) |
| Broche 7 | PA1 — Port A bit 1 (analog input) |
| Broche 8 | PA2 — Port A bit 2 (analog input) |
| Broche 9 | PA3 — Port A bit 3 (analog input) |
| Broche 10 | PA4 — Port A bit 4 |
| Broche 11 | PA5 — Port A bit 5 |
| Broche 12 | PA6 — Port A bit 6 |
| Broche 13 | PA7 — Port A bit 7 |
| Broche 14 | PB0 — Port B bit 0 |
| Broche 15 | PB1 — Port B bit 1 |
| Broche 16 | PB2 — Port B bit 2 (OC1B) |
| Broche 17 | PB3 — Port B bit 3 (OC1A) |
| Broche 18 | PB4 — Port B bit 4 |
| Broche 19 | PB5 — Port B bit 5 |
| Broche 20 | PB6 — Port B bit 6 |
| Broche 21 | PB7 — Port B bit 7 |
| Broche 22 | PC0 — Port C bit 0 |
| Broche 23 | PC1 — Port C bit 1 |
| Broche 24 | PC2 — Port C bit 2 |
| Broche 25 | PC3 — Port C bit 3 |
| Broche 26 | PC4 — Port C bit 4 |
| Broche 27 | PC5 — Port C bit 5 |
| Broche 28 | PC6 — Port C bit 6 |
| Broche 29 | PC7 — Port C bit 7 |
| Broche 30 | PD0 — Port D bit 0 (RXD) |
| Broche 31 | PD1 — Port D bit 1 (TXD) |
| Broche 32 | PD2 — Port D bit 2 (INT0) |
| Broche 33 | PD3 — Port D bit 3 (INT1) |
| Broche 34 | PD4 — Port D bit 4 |
| Broche 35 | PD5 — Port D bit 5 (OC0B) |
| Broche 36 | PD6 — Port D bit 6 (OC0A) |
| Broche 37 | PD7 — Port D bit 7 |
| Broche 38 | RESET — Reset input (active low) |
| Broche 39 | XTAL1 — External crystal oscillator input |
| Broche 40 | XTAL2 — External crystal oscillator output |
| Broche 41 | PE0 — Port E bit 0 |
| Broche 42 | PE1 — Port E bit 1 |
| Broche 43 | PE2 — Port E bit 2 |
| Broche 44 | PE3 — Port E bit 3 |
| Broche 45 | PE4 — Port E bit 4 |
| Broche 46 | PE5 — Port E bit 5 |
| Broche 47 | PE6 — Port E bit 6 |
| Broche 48 | PE7 — Port E bit 7 |
Applications typiques
ATMEGA32HVE2-PLPW convient pour 6 applications: 12V Lead-Acid Battery Monitor, 24V Industrial Battery Pack Supervision, UPS Battery Health Module, E-Bike / E-Scooter Battery Pack BMS, Solar Charge Controller Telemetry, Automotive 12V Auxiliary Battery Supervisor.
12V Lead-Acid Battery Monitor
The ATMEGA32HVE2-PLPW is purpose-built for 12V lead-acid battery monitoring. Its 4V-25V supply range allows direct connection to the 12V battery rail without an external pre-regulator, while the differential-input ADC performs shunt-based current sensing for Coulomb counting. The 32KB Flash stores SoC lookup tables for flooded, AGM, and gel cell chemistries, and the 15MHz AVR core executes real-time State-of-Charge algorithms within each ADC conversion cycle.
Recommandé
24V Industrial Battery Pack Supervision
For 24V industrial battery stacks, the ATMEGA32HVE2-PLPW's 25V maximum input rating provides adequate headroom for a two-cell 24V lead-acid string while supporting the 9V-24V typical operating range. The device's high-voltage-tolerant I/O pins interface directly to battery node voltages through resistive dividers, eliminating signal-conditioning circuitry. The 48-VQFN exposed pad dissipates heat from continuous ADC sampling during float-charge equalization.
Recommandé
UPS Battery Health Module
Uninterruptible power supplies rely on accurate lead-acid battery health monitoring to predict runtime during outages. The ATMEGA32HVE2-PLPW's 1KB EEPROM stores battery serial number, cycle count, and last-known SoC through power cycles, while the 4KB SRAM buffers instantaneous voltage and current samples for trend analysis. Its deterministic single-cycle AVR instructions ensure consistent ADC-to-PWM latency for closed-loop charge regulation.
Recommandé
E-Bike / E-Scooter Battery Pack BMS
E-bike and e-scooter battery packs use lead-acid cells in entry-level designs where cost dominates over energy density. The ATMEGA32HVE2-PLPW manages discharge cutoff, over-current protection, and SoC indication from a single 48-VQFN IC. Its wide supply tolerance handles motor-regenerative voltage spikes up to 25V without external TVS protection in many cases, reducing BOM cost. The exposed-pad package fits within the confined battery housing of two-wheeled EVs.
Recommandé
Solar Charge Controller Telemetry
Off-grid solar charge controllers require battery monitoring that survives wide input voltage swings from the PV array. The ATMEGA32HVE2-PLPW interfaces directly to the 12V or 24V lead-acid battery bank and reports SoC, cycle count, and fault conditions over UART or LIN to the charge controller's main MCU. Its hardware timer/counters drive PWM-based load shedding when battery voltage drops below configurable thresholds, eliminating firmware polling overhead.
Recommandé
Automotive 12V Auxiliary Battery Supervisor
In automotive applications, the ATMEGA32HVE2-PLPW supervises the 12V auxiliary battery that powers infotainment, lighting, and accessory systems when the engine is off. Its 4V-25V input accommodates load-dump transients and cold-cranking voltage sags, while the differential ADC measures parasitic drain to detect abnormal quiescent current. The 32KB Flash supports ISO 26262-style diagnostics logging for warranty claim analysis.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA32HVE2-PLPW — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA32HVB-8X3 | ATMEGA32C1-15AZ | ATMEGA32A-AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VQFN (7x7 mm) | 48-TQFP (different footprint, not drop-in PCB) | 48-VQFN (7x7) - same | 48-VQFN (7x7) - same |
| Core | AVR 8-bit, 15 MHz | AVR 8-bit, 8 MHz | AVR 8-bit, 15 MHz | AVR 8-bit, 16 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 2 KB | 2 KB |
| Supply Voltage Range | 4 V to 25 V | 4 V to 25 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V |
| Target Application | Lead-acid BMS | Lead-acid BMS | Automotive CAN node | General purpose |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
Principaux différenciateurs
- Wide 4V-25V supply range eliminates external pre-regulator (vs ATMEGA32A-AU)
- Differential-input ADC for shunt current sensing (vs ATMEGA328P-AU)
- Integrated coulomb-counter peripherals optimized for BMS (vs ATMEGA32C1-15AZ)
Notes de conception
The 48-VQFN package has an exposed thermal pad on its underside that MUST be soldered to a ground-plane copper pour of at least 1 square inch to maintain junction temperature within datasheet limits. Estimated: at 15MHz operation with continuous ADC sampling, the device draws approximately 15-20mA; without the exposed pad connected, junction temperature can rise 30-40C above ambient, degrading ADC accuracy. Use thermal vias (0.3mm diameter, 1mm pitch) under the pad to conduct heat to inner PCB layers.
Place the AVCC decoupling capacitor (100nF ceramic in parallel with 10uF electrolytic) within 5mm of the AVCC pin to suppress ADC reference noise. The AREF pin should have a 100nF ceramic capacitor to AGND; do NOT load AREF with external circuitry as this degrades ADC linearity. Keep high-current battery traces away from the analog input pins to prevent conducted noise coupling into the differential current-sense inputs.
Do not exceed the absolute maximum supply voltage of 25V on any VCC pin - load-dump transients in automotive 12V systems can spike to 40V+ and require an external TVS diode (such as SMBJ24A) for protection. Ensure firmware initializes the ADC differential-mode registers correctly for shunt current sensing; using single-ended mode with a differential signal introduces gain error. The debugWIRE reset pin requires a capacitor of at least 1nF to ground for in-circuit programming reliability.
The 9V-24V typical operating range supports direct battery connection, but for quiescent-current-sensitive applications (parasitic drain monitoring), switch the MCU into Power-Save mode between ADC samples. In Power-Save mode the device draws less than 1uA while retaining the RTC timer for periodic wake-up. This is critical for automotive 12V battery supervisors where standby drain must remain below 100uA to avoid discharging the battery over weeks of vehicle storage.
Informations de conformité
RoHS and lead-free per Microchip product page. Standard part is not AEC-Q100 qualified; for automotive-grade BMS in safety-critical applications, consider ATMEGA32C1-15AZ or other Q100-qualified ATmega variants.
